Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b3dc51a545c75b…

MALICIOUS

PDF

65.8 KB Created: 2020-08-01 14:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7a68bc0bfb1fc2d5da20cdbcf7afc06 SHA-1: 5d5f92d3c6f235c12221e07f091f21944590840a SHA-256: 77b3dc51a545c75b39007520c8714c0dba88172a18f4a683ab0c718e1b1bb871
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a redirector link farm. The primary redirector URL, https://ttraff.cc/pify?keyword=kcra+weather+radar, is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=kcra+weather+radar In PDF document text
    • http://files.ajewellness.com/uploads/1/3/1/6/131606027/1562287.pdfIn PDF document text
    • http://files.stdastoriayouth.com/uploads/1/3/0/7/130740053/kefagev-woronalotixul.pdfIn PDF document text
    • http://files.stephencoetzee.co.uk/uploads/1/3/1/3/131398117/31d41bf9e0107.pdfIn PDF document text
    • http://files.millerstaxidermy.net/uploads/1/3/0/8/130874489/mixosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/72528700622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6212/3941/files/lubopumawavatavas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/71275143007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/26791680382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/54824313677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/55826573790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/68692906617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/81635408181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/rijetorige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/fefebexilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/2885613562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/arimasu_vs_imasu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB841 4880 bytes
SHA-256: acbfcae5c6540ec2235b74fcc8303affe5240484c46ff463c08118f2050381ce
font_01_sfnt_off0000c8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E8 16000 bytes
SHA-256: c9c7514b44e2d9e20a3f59933155f28b18d6faa7aae39f00410bf1a28c758df7

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